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  <title>Returns the address being used by this for slaveOkay reads</title>

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</div><hr /><div id="mongo.getslave" class="refentry">
 <div class="refnamediv">
  <h1 class="refname">Mongo::getSlave</h1>
  <p class="verinfo">(PECL mongo &gt;=1.1.0)</p><p class="refpurpose"><span class="refname">Mongo::getSlave</span> &mdash; <span class="dc-title">Returns the address being used by this for slaveOkay reads</span></p>

 </div>

 <div class="refsect1 description" id="refsect1-mongo.getslave-description">
  <h3 class="title">说明</h3>
  <div class="methodsynopsis dc-description">
   <span class="modifier">public</span> <span class="type">string</span> <span class="methodname"><strong>Mongo::getSlave</strong></span>
    ( <span class="methodparam">void</span>
   )</div>


  <p class="para rdfs-comment">
   This finds the address of the secondary currently being used for reads. It is
   a read-only method: it does not change anything about the internal state of
   the object.
  </p>

  <p class="para">
   When you create a connection to the database, the driver will not immediately
   decide on a secondary to use. Thus, after you connect, this function will
   return <strong><code>NULL</code></strong> even if there are secondaries available. When you first do a
   query with slaveOkay set, at that point the driver will choose a secondary
   for this connection. At that point, this function will return the chosen
   secondary.
  </p>

  <p class="para">
   See <a href="mongo.queries.html" class="link">the query section</a> of this manual for
   information on distributing reads to secondaries.
  </p>

 </div>


 <div class="refsect1 parameters" id="refsect1-mongo.getslave-parameters">
  <h3 class="title">参数</h3>
  <p class="para">此函数没有参数。</p>
 </div>


 <div class="refsect1 returnvalues" id="refsect1-mongo.getslave-returnvalues">
  <h3 class="title">返回值</h3>
  <p class="para">
   The address of the secondary this connection is using for reads.
  </p>
  <p class="para">
   This returns <strong><code>NULL</code></strong> if this is not connected to a replica set or not yet
   initialized.
  </p>
 </div>


 <div class="refsect1 errors" id="refsect1-mongo.getslave-errors">
  <h3 class="title">错误／异常</h3>
  <p class="para">Issues <strong><code>E_DEPRECATED</code></strong> warning</p>
  <p class="para">
   The returned results aren&#039;t really useful as the secondary selection
   process is done on each query and database command execution.
  </p>
 </div>


 <div class="refsect1 changelog" id="refsect1-mongo.getslave-changelog">
  <h3 class="title">更新日志</h3>
  <p class="para">
   <table class="doctable informaltable">
    
     <thead>
      <tr>
       <th>版本</th>
       <th>说明</th>
      </tr>

     </thead>

     <tbody class="tbody">
      <tr>
       <td>1.2.11</td>
       <td>Emits <strong><code>E_DEPRECATED</code></strong> when used.</td>
      </tr>

     </tbody>
    
   </table>

  </p>
 </div>


 <div class="refsect1 seealso" id="refsect1-mongo.getslave-seealso">
  <h3 class="title">参见</h3>
  <ul class="simplelist">
   <li class="member"><span class="function"><a href="mongocursor.info.html" class="function" rel="rdfs-seeAlso">MongoCursor::info()</a> - Gets the query, fields, limit, and skip for this cursor</span></li>
  </ul>
 </div>


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